Chronograph



(Model 1 3 Sheets-Sheet 1.

J. KARR.

OHRONOGRAPH.

No. 263,184. m 1 Patented Aug. 22, 1882.

3 Sheets-Sheet 2.

. J. KARE.

GHRONOGRAPH.

No. 263,184. Patented Aug. 22, 1 882.

(ModeL) 3 Sheets-Sheet 3; J. KARE.

OHRONOGRAPH. No 263,184. Patented Aug. 22, 1882.

UNITED STATES PATENT OEEicE.

JACOB KAI-UR, OF WASHINGTON, DISTRICT OF COLUMBIA.

CHRONOGRAPH.

SPECIFICATION forming part of Letters Patent No. 263,184, dated August22, 1882.

Application filed May 13, 1882. (ModeL) To all whom it may concern:

Be it known that I, JACOB KARE, of \Vashington, in the District ofColumbia, have invented certain new and useful Improvements in TimeMechanism; and I do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure l is aperspective view of the clock as in use. Fig. 2 is a like view from thefront of the movementseparated from its case. Fig. 3 is an elevation ofthe rear side of the same. Figs. 4 and 5 are elevations of said movementfrom opposite sides. Fig. 6 is a perspective view of the parts of thecenter arbor separated from each other. Fig. 7 is acentral longitudinalsection of the same united and in position. Fig. 8 is a perspective viewof the old minutearhor and its attachments separated from each other.Fig. 9 is acentral longitudinal section of the same united; and Fig. 10is a perspective view of the recording or marking hand, the full linesshowing the normal position of parts and the dotted lines theirpositions when moved into contact with the dial.

Letters of like name and kind refer to like parts in each of thefigures.

The design of my invention is to furnish, in a simple, inexpensive, andconvenient form, means whereby, in addition to the time usuallyindicated by a clock, seconds and fractions of the same may beindicated, and, if desired, recorded; and to this end it consistsprincipally in the arrangement of the operative parts of the train,whereby a sweep secondshand is driven by a centrally-located arbor,substantially as and for the purpose hereinafter set forth.

1t consists further, in the means employed for operating the minutesandhours hands and for enabling the same to be moved independently,substantially as and for the purpose hereinafter specified.

It consists, further, in the means employed for arresting the motion ofthe balance-wheel, substantially as and for the purpose hereinaftershown.

In the annexed drawings, A represents the front plate, and B the backplate, of the moveheld in relative parallel positions by means of posts0 in the usual manner.

Journaled at one side of the frame thus constructed is the main arbor D,upon which is journaled the main wheel (I, and to which is connected theinner end of a inainspring, E, the outer end of said spring beingattached to or upon one of the posts 0. Said main wheel is connectedwith said arbor when the latter is moved in one direction by the usualpawl, c, and ratchet (1, while when said arboris rotated in an oppositedirection said wheel is not moved.

Journaled below the arbor D and nearer the transverse center of theframe is a second arbor, F, upon which is journaled a pinion, G, andwheel H, which parts are rigidly connected together, and are held infrictional contact with said arbor by means of a four-armed spring, I,that is placed in rear of said wheel, and is caused to bear against thesame and to hold the front end of said pinion against a shoulder,f, thatis formed upon said arbor. A collar, f, secured to and made adjustableupon the latter in rear of said spring, holds the same in place andregulates the degree of its pressure upon said wheel, the arrangementbeing such as to permit said arbor to be rotated within said wheel andpinion when desired, while sufficiently rigid for ordinary trainpurposes.

The pinion G meshes with and receives motion from the wheel (I, whilethe wheel H meshes with and imparts motion to a pinion, K, that isattached to and revolves with an arbor, L, journaled slightly above andtoward the opposite side of the frame.

Journaled at the center of the frame, at the point heretofore occupiedby the second or minutes arbor F, is an arbor, M, which, as seen inFigs. 6 and 7, is straight from its rear end to the inner face of thefront plate, A, at which point is provided a collar, on, and from thenceto its outer end, which projects beyond said plate and the dial, issomewhat reduced in size.

Journaled upon the arbor M is a pinion, N, and wheel 0, which are unitedby means of an interposed sleeve, 01., so as to move together. The frontend of said pinion bears against the collar m, and is held in positionthereon by ment, connected together at their corners and I means of afour-armed spring-plate, P, which is secured upon said arbor in rear ofsaid wheel, and has the ends of its arms in engagement with the rearface of the latter. A setsorew, 10, passing radially inward through ahub,p, attached to said spring-plate, or through acorrespondingly-shaped collar placed in rear of the same, locks saidparts in position and permits any desired degree of pressure upon saidwheel to be obtained.

The pinion N meshes with and receives motion from a wheel, K, which issecured upon the arbor L, which motion is communicated to the arbor Mand causes the latter to revolve.

The arbor M, thus combined with the wheel 0 and pinion N, may be freelyrotated within the latter for the purpose of setting the seconds-handcarried thereon, while for the ordinary purposes of a time-train saidparts are connected with all necessary rigidity.

Above the wheel 0 is pivoted an arbor, Q, which carries'an escape-wheel,q, and a pinion, g, which engages with said wheel, a pallet-arbor, R,having pallets r, and a balancearbor, S, provided with a balance-Wheel,s, and hair-spring s, all in the usual manner.

The front end of the arbor M receives a sweep seconds-hand, T, which hassuch length as to cause its end to pass over the outer part of the dialU, at which 'point said dial is provided with sixty divisionsrepresenting a like number of seconds, and each of such divisions issubdivided into four equal parts, each of which represents one-fourth ofa second, when,

as the train is timed to quarter-second beats, it will be seen that ateach beat said secondshand will move forward one-fourth of a second, andif properly adjusted its end will rest over one of the subdivisions,thus enabling an observer tonote with as great ease and accuracy thetime indicated as though an independent quarter-seconds-hand of usualconstruction were employed.

Surrounding the projecting front end of the seconds-arbor M is a hub orsleeve, a, which is secured to and projects forward from the plate A,and furnishes a bearing for and upon which is journaled .a pinion, V,that is provided with a projecting hub, 12, and has the size and numberof teeth of the dial-pinion heretofore placed upon the minutes-arbor.

Upon the hub v is journaled a wheel, W, which has a hub, w, that extendsnearly to the end of said hubo, said wheel and. hub being in allrespects the same as the dial-wheel usually employed for carrying anhours-hand.

The pinion V and wheel W are connected by .means of the usualintermediate wheel, X, and pinion Y, which are rigidly fastenedtogether, and are journaled upon a stud, a, that projects outward fromthe plate A, while all of said dial-wheels and pinions are driven bymeans of a pinion, Z, which is secured upon the projecting end of thesecond arbor F, and meshes with said intermediate wheel X.

The projecting end of the hub 17 receives a minutes-h and, A, and thehub w an hours-hand, B, for which hands the central portion of the dialU, inside of the portion containing divisions for the seconds-hand, isprovided with the usual divisions for indicating hours and minutes.

The seconds-handT is set by rotating its arbor M within its wheel andpinion O and N, for which purpose a button, 0, is secured upon the rearprojecting end of said arbor, and ,being connected with the train onlyby friction, no interference with the movements of said train is causedby such change.

In consequence of the friction-connection between the second or minutesarbor F and the train, said arbor may be freely rotated by means of abutton, D, attached to its rear projecting end, so as to set the minutesand hours hands A and B, respectively, without stoppage of orinterference with the movements of the train, the dial-wheels being onlyconnected with the latter through said arbor.

The construction shown en ables a sweep seconds-hand capable ofindicating quarter-seconds to be attached to a clock of usualconstruction without increasing the size of the time-train or addingmaterially to its cost.

In order that the time indicated by the seconds-hand may be recorded, ifdesired, the following-described mechanism is added to the clock, viz:Secured at one end to or upon the outer face, at the short end of theseconds-hand T, is a marker, E, that is constructed from spring metal inthe form shown in Fig. 10, and at its free end is provided with an arm,0, that passes rearward through an opening, t, which is formed in saidhand near its point.

The normal position of the marker E is, as seen in Figs. 7 and 10, withits outer end standing away from the dial U, and by a rearward pressureupon its center its point 6 may be caused to impinge upon said dial, orupon a recording-surface placed thereon, so that it is only necessarythat said point be made sufficiently sharp to puncture or indent suchsurface, or that it be provided with ink or other like means for makinga mark upon the same, in order that an accurate record may be secured ofthe position of the seconds-hand at the instant such contact isproduced.

The manipulation of the marker E is effected by means of a stud, F,which is loosely journaled within a corresponding opening, g, at thecenter of the glass front G of the clock, and is capable withoutdisplacement of a certain amount of longitudinal motion therein. Theinner end of said stud is in contact with the outer face of saidmarker,.and it is only necessary that a slight inward blow be given tothe former to cause the point of the latter to impinge upon therecording-surface and make the record. The outward spring of said It isdesigned that paper disks corresponding to the outer portion of the dialU be provided for attachment to the latter, and that each, when onceused with the marker E, shall be removed and shall form a record of thetime.

In order that the movement of the train may be instantly arrested, ifdesired, I journal a bell-crank, H, within the upper portion of themovement, and provide one end with a springarm, h, which, by a slightmovement of said crank, may be caused to engage lightly with the side ofthe balance-wheel s and instantly arrest the motion of the same.

The stop described is operated by means of a rod, 1, that is pivoted atone end to one arm of the crank H, and from thence passes outwardthrough the casing L, and has upon its outer end a button, i. If, now,said rod be pulled outward, the motion of the balancewheel will beinstantly arrested, while by an inward movement of said rod saidbalancewheel will be released and will instantly resume its vibrations.

Having thus fully set forth the nature and merits of my invention, whatI claim as new 1s- 1. A clock-movement having a single timetrain inwhich the minutes-arbor is located at one side of the center of thetrain, and an arbor which carries a sweep seconds-hand capable ofadjustment independent of the train and adapted to mark quarter-seconds,which arbor is located at such center in the place heretofore occupiedby said minutes-arbor, substantially as and for the purpose set forth.

2. As a means for operating the minutes and hours hands, thehub orsleeve a, secured to and projecting from the plate A, the hollow pinionV, provided with a projecting hub, 21, the wheel WV, having the hub w,the intermediate wheel, X, and pinion Y, and the pinion Z, secured uponand rotating with the second arbor F, which arbor is connected with thetrain by spring friction, said parts being combined substantially as andfor the purpose specified.

3. As a means for arresting motion of the balance-wheel s, thebell-crank H,journaled between the plates A and B, operated by the rod 1and button 6, and provided with the spring-arm h, which by the movementsof said crank may be caused to engage with or removed from the side ofsaid balance-wheel, substantially as and for the purpose shown.

In testimony that I claim the foregoing I have hereunto set my hand this13th day of May, 1882.

JACOB KARE. Witnesses:

GEO. S. PRINDLE, J. T. GoLnWELL.

